Knife for stave-jointing machines



H. A. GROSSLEY.

KNIFE FOR STAVE JOINTING'MAGHINES.

No. 269,831. Patented Jan. 2, 1883.

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HARRY A. GROSSLEY, OF CLEVELAND, OHIO.

-KNlFE FOR STAV E-JOINTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 269,831, dated January2, 1883,

Application filed February 27, 1880.

To all whom it may concern:

Be it known that LEARRY A. GRossLEY, a citizen of the United States, anda resident of Oleveland,in the county of Cuyahog'a, in the State ofOhio, have invented certain new and useful Improvements in KnivesforStave-Jointing'and Kindred Machines,of which thefollowing is afnll,clear, and exact description, reference being bad to theaccompanying drawings,

illustrating" the same and forming part of this specification.

Owing to the hard work to be done, the rapidity of revolution of thecutter-head, and the thickness of its stock, the knives employed instave-jointing, heading, and kindred machines have necessarily been madeof great width; but. the active edge has formed only a'small portion ofthe knife-stock, and there remained when the edge was exhausted a largeproportion of good metal that had to be thrown aside. In thisconstruction the cost for the bodymetal has beenall out of proportion tothe utilization of that metal, and the necessarily frequent renewalshave been made at a heavy expense to the consumer without anyproportionate gain to the manufacturer. The frequent reg'rinding of theknives has also caused loss of time.

Now,it is the object of this invention to more fully utilize theknife-stock, obviate the loss of time incident to frequent regrinding,and to produce a knife that will wear twice as long as the old one, withbut a slight increase in first cost, which increase is entirely offsetby the increased durability and saving of material.

The invention consists in a knife for coopers machinery, composed of astock "with cuttingedges on two of its sides, and adapted to be reversedwhen dulled or worn,'and set or adjusted to position.

Theinvention also consists in a knife for coopers machinery combinedwith a cap or shaving-breaker, and means to adjust and to hold the-twotogether upon the tool stock or head, all as hereinafter specificallyset forth and claimed.

1n the accompanying drawings, in the several figures of which like partsare similarly designated, Figure 1 is a cross-section of part of thehead of one of my stave-jointing machines with the knife and cap inposition. Fig. 2 is and Fig. 3 is a perspective view of my cap.

In my improvement I employ a stock, d, of less width than the formheretofore used, and provided with cutting-edges e e on two of itsopposite edges. These cutting-edges are of uniform construction. Insteadof the edgeslots of the old form of knife, I provide my improved knifewith internal slots,f, arranged about midway between the cutting-edgesof the knife, so as to permit of the reversal of the knife when one ofits edges becomes worn out. I prefer to dish the face of the knife, sothat when the flat cap 9 is applied thereto its edges only will touchthe knife, and hence such cap, upon the application of the bolts orother lastening, will bind upon the knife with some resilience, andthereby most firmly hold theknife in place.

The cap is provided with slots h, adapted to be aligned with the slotsof the knife to receive the bolts used to fasten them to the head. Thecap is also provided with other sl0ts,t' '5, extending transverselythereof, and when the cap and knife are in place these slots overliecavitiesjj in the face of the knife, the object thereof being to affordaccess to the knife by a punch or drift to set the knife.

When one edge of my improved knife is dulled themachineisonlystoppedlong enough to reverse the knife and set its other edge, and theresharpening of dulled edges may be conveniently eifected at odd times.Myknife thus equals two of the ordinary knives in duration of use, andis equal to two sets of such knives in economy of use. Now, with mydouble-edged knife I save considerable in the first cost of stock; butwhile this is nearly ofi'set in the cost of the extra edge, still theaggregate savingin the durability of the knife largely offsets these.

Vllitb I claim is- I 1. The knife for coopers machinery, composed of thetransversely slotted and recessed stock (Z, having two cutting-edges, ee, and a slotted cap, and means to secure the two together and to astock, whereby as one edge is worn or dulled the knife may be reversedand the other edge brought into position for use, substantially asspecified.

2. The herein-described knife for coopers machinery,provided with aconcave face, coma perspective view of my double-edged knife, I

bined with and bound to place by a flat cap gether and to a stock,substantially as and for overlying and belfed down thereupon, subthepurpose specified. stuntiall as swecified. r 1', w r 3. The hereindescribed knife for Coopers 1 HARhX bhObbLLx' \Vitnesses: FRED WITT,AMES D. ULOUGII.

machinery, provided with recesses j j, combined with an overlying cap,9, having trans- \GISB slots 5 1', and means to secure the two to-

